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US Patent: 378,251
Die for Making Auger-Bits
Patentee: Charles H. Irwin (exact or similar names) - Wilmington, OH USPTO Classifications: 72/352, 72/469, 72/478 Tool Categories: tool making : making drills and augers Assignees: Irwin Auger Bit Co. - Wilmington, OH Manufacturer: Not known to have been produced Witnesses: Jno. W. Strehli Philip Roettinger, Jr.	Patent Dates: Applied: Oct. 15, 1887 Granted: Feb. 21, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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